My shop had a wall clock. It broke. I tossed it. I decided to 3d print a replacement.
I had a specific clock in mind and was pretty adamant about it. I wanted the plainest, simplest, most unremarkable clock to ever exist. I was thinking of the clocks in my old high school. (At the time I hated those clocks. Even now I’m still thankful I’m out of school… fuck that place. Weirdly, the clocks in my school would click backwards just a little bit, before moving forward for each minute. I never knew why. Nobody knows why. To replicate that would be far more involved than I care to go.)
Makerworld had a shitload of clock models. Some were very impressive! I sorted through them rejecting dozens for the odd reason that they were too flashy, or too clever, or too beautiful. I didn’t want a work of art. I wanted a humble, easily ignorable clock. I wanted something not too big. The footprint of my Bambulab A1 is about 10″ diameter so that worked out nicely. (The Bambulab has a 256 mm cube build envelope.)
I found just want I wanted. If you want to make the same thing: go here.

I had to buy a clock movement. Makerworld has the exact right movement for this model but it’s nine bucks. I thought I could get the same thing cheaper from Amazon and I’d get “free” shipping.
This got weird because I couldn’t remember the word for “movement”. If you can’t remember “clock movement” searching on “clock guts” is just going to make the algorithm cry. I eventually ran into “Persistence of Memory” by Salvador Dali.
That distracted me big time! For inexplicable reasons Dali’s image, painted in 1931, drilled into my brain when I was just a kid. Why did a kid who should be watching cartoons get obsessed about a 40+ year old painting? No idea. Maybe Dali was the real deal?

Eventually, I ordered exactly what I wanted. It cost seven bucks. No matter how much you shop around, it’s going to cost about $7. Was all that effort worth it to save two bucks? NO!
Seven bucks was still about twice what I expected to pay. Then again it’s a fair price and the source of confusion is me.
Warning geezer cogitation incoming!

The world has changed. Fiat currency has done what fiat currency always does. Numbers just aren’t what they were when I was learning “the value of a dollar”. I was fine with prices until the Bidenverse turbocharged everything. Those old numbers are gone; never to return. I think I’ll always feel that way. Inflation was annoying but steady for decades. Then some dude got more votes than any other candidate in history in the middle of the night after the election had been decided. The election was subsequently undecided, and I lived in a new universe where a mini-van costing fifty grand doesn’t even raise an eyebrow. I think some things just hit the limits of plasticity of the mind. It’s not necessarily political, it’s just human.
I remember the novelty of spending Escudos (Portuguese currency before the EU ate Europe). Or of spending Pesos in Mexico. It was always a reminder I was in a different world; spending such large digits on such small things. It was as if people quoted prices in dimes or nickels. “The cost for that pair of boots? 480 dimes.”
I knew it wouldn’t last. Everything feels more or less like Peso-ish numbers now. It’s not hard to drop a grand on a set of four tires. Burgers and a beer for a couple is now a C-note. I remember when a twenty dollar bill was plenty. I remember it cost about 2,000 +/- Escudos for a burger and an evening getting drunk in a tavern in Lisbon in the 1990’s.
I’m not complaining, just observing. I’ve known old people whom said the same thing. Now it’s my turn. Perhaps you had a grandparent who never got used to gas costing more than a buck? Ever hear a Boomeriffic geezer wonder why a Millennial can’t pay off college by bussing tables in the summer? It is what it is.
Live long enough and you’ll be there. You’ll spend two hours shopping for a $9 item to score a deal at $7 and yet wonder why you couldn’t get it for $3.50.
/Geezer Cogitation
Despite my shopping hassles, I thought $7 for a clock was damn cheap. It would be double that once I added in the filament. Make your own clock for $14! What a brilliant guy to save so much money…
WRONG!
In the middle of this project I wandered through a Walmart. I thought a clock was like $25 – $30. Nope. They’re cheaper than that. The smallish ones in this display ranged from about $15 – $20.

It’s hard to compete with plastic injection molded Chinese crap. My 3d fused deposition molded clock would not save me any money.
The next step was to pick filament. I freaked out and bought way too much of filament when I started selling sawhorse jigs last December so I’ve got many options. Since it wasn’t load bearing or anything special I could use either PLA or PETG.
A new roll of PLA black had a spool malfunction last month. It was a perfect time to fix it and use it. I 3d printed some tools to manage the mis-aligned spool and hook a different spool to to my power drill. I respooled, thus rescuing the filament. That was a fun challenge.
For the clock face I used a spool of white PLA filament. For the “text” I used black. Not very creative but that’s what I wanted. Time to start printing!
Whomever made this design was smart. Rather than embedding the clock numerals, which would require swapping filament with the AMS Lite, the designer split the numbers and the background into two parts. One is a backing of black (or any color you want) with the numbers embossed (sticking out). The other is a front of white (or any color you want) with voids perfectly aligned so the embossed “text” pushes through. Brilliant! The whole thing is held together with a third part that screws everything together with huge coarse threads. Also brilliant.
Part 1: The face: This went easy peasy. Very satisfying!

Part 2 the backing. This has huge bridges with no support. Not ideal but it worked.


I planned to make the outer ring in black. But then I decided on red to match the Milwaukee Packouts scattered about the shop. I didn’t have any red PLA so I used red PETG. Would the threads from two different materials work together? I’d find out.
The horizontal unsupported PETG made stringy crappy threads.

But it didn’t matter. It wasn’t a tight tolerance part.

There are a few parts where the white face couldn’t fill embossed voids; like the zero in “10”. The model printed little white things to fill them in. I installed them with superglue.
I could have printed clock hands but I liked the ones that came with the movement. The “seconds” hand was red. It matched my red housing quite nicely.
It cost $15.37 total; $7 for the movement and $8.37 in filament. I didn’t go overbudget, in fact it was at the low end of Walmart clock costs. Whew! But I didn’t save a lot either.
That’s OK. I think it looks cool and I made it myself.












